Image Compression
Let's talk a little about image compression. Two commonly used image formats among digital camera users are JPEG and RAW. The JPEG image format is compressed and is considered to be a "lossy" format.
Image compression
In order to store digital pictures economically, the image data is compressed. However, compression often causes a reduction in picture quality.
Image converter
Semiconductor image converter (CCD chip).
An image compression file format named after the Joint Photographic Experts Group who devised it. The JPEG format compresses images but sacrifices image detail (lossy compression). See also Motion-JPEG.
Proper use of image compression can make a huge difference in the appearance and size of your website image files.
Image compression makes it possible to take a large color-image file and reduce its size. This reduces the amount of memory required to store it or decreases the time required to transmit it.
JPEG compression is defined only for still-image compression, although a number of variants referred to as "motion JPEG" are used in digital videography. JointPhotographicExperts Group (the committee that established the baseline algorithms), .jpg. .
Selecting Image Compression
Selecting JPEG or RAW File Format
Changing Exposure Modes
Using Image Zone Modes
Using Program AE
Selecting a Shutter Speed
Selecting an Aperture
Using Manual Mode
Switching Between Spot and Non-Spot Metering ...
The de facto standard for image compression in digital imaging devices. JPEG is a lossy compression technique, capable of reducing digital images files to about 5% of their normal size.
it is a standardized image compression mechanism. Created especially for the transmission and storage of photographic images, it offers a significant reduction in
file size. It uses a lossy compression scheme by averaging the data in blocks of ...
JPEG 2000 - JPEG 2000 is a wavelet-based image compression standard developed by the Joint Photographic Experts Group and with the intention of superseding their original discrete cosine transform-based JPEG standard (created in 1992).
JPEG is a color image compression technique that reduces file sizes by eliminating redundant or unnecessary image data. Many digital cameras automatically save images using the JPEG format.
Backup Strategy: Casual photographers should try and save their JPEG files using the highest quality "superfine" (or similar setting) to minimize image compression artifacts.
JPEG - Joint Photographic Experts Group - The name of the committee that designed the standard image compression algorithm. JPEG is designed for compressing either full-color or grey-scale digital images of "natural", real-world scenes.
Image compression
Image file formats
Motion JPEG
Graphics editing program
GDI+ vulnerability section of GDI article, exploitable bug in JPEG handling code of GDI+ library
Comparison of layout engines (graphics)
Generation loss
PNG ...
Learn all about image file formats and image compression
This article discusses the various image file formats out there. Also learn about the concepts behind image compression.
JPEG file has very good image compression technique in terms of reducing the storage size. However JPEG uses a lossy compression technique.
LOSSY - A form of image compression when saving the image that discards data from it. Saving a picture as a JPEG uses lossy compression.
Joint Photographic Experts Group. A common method of image compression. JPEG compression is said to be 'lossy', detail is permanently lost each time the image is edited and saved.
Mb
Megabytes.
JPEG - Joint Photographic Experts Group; the most common image compression format used by digital cameras.
Landscape photo composition - An orientation where the width is greater than the height.
Maths routines used in cameras, often in their colour management and image compression systems.
Anti-Aliasing
A system used to reduce the "stair step" effect sometimes seen in sharp edges.
A standard created by the Joint Photographic Experts Group for a wavelet-based, image compression algorithm and the accompanying file format.
Short for graphic image format; an image file format widely used on the Internet; provides high-quality image compression.
gradient fill:
An image fill that gradually transitions from one color to another; commonly used in graphics editors.
Joint Photographic Experts Group. The group of the ISO responsible for the creation and maintenance of the JPEG still-image compression standard.
JTC1
Joint Technical Committee 1. A group within the ISO/IEC that handles information technology.
Artifact - Unwanted distortions in an image caused by lossy image compression.
JPEG is a standardized image compression mechanism designed for compressing full-colour or grey scale images of natural, real-world scenes. JPEG uses lossy compression, which can damage image quality.
- A method of reducing the size of files, such as image files, by representing the sets of binary numbers in the file with shorter string that conveys the same information. Many image editing programs offer some sort of image compression as an ...
In addition, TIFF is a flexible, adaptable file format for managing images and data by including the header tags (size, definition, image-data arrangement, image compression) defining the image's geometry.
This can usually take the form of reducing the number of available pictures in the image, which does lower the quality of the image in general. Since most DSLR camera shoot on a RAW format, you will find that you have to use image compression on ...
DSP - Digital Signal Processor A versatile all purpose chip, used in cameras to handle basic contrast and brightness adjustment and image compression. Dust Tiny grains of stuff, e.g.
 See also: Compression, Image, Digital, Format, Photograph
  
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